<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        const arrs = ['1','2','3','4','5']

        // arrs.forEach((item,index,e) =>{
        //     console.log("item",item)
        //     console.log("index",index)
        //     console.log("e",e)
        // })

        // let arr = arrs.map((item,index,e)=>{
        //     return item * index
        // })
        // console.log(arr)

        // let arr = arrs.filter(item=>{
        //     return item>2
        // })
        // console.log(arr)
        // arrs.push('6')
        // arrs.unshift('0')
        console.log(arrs)
    </script>
</body>
</html>